Rinse thoroughly, repeat if necessary. Blocked pipes Pour 50ml to 100ml of Fenwicks Waste Pipe & Tank Cleaner down the blocked pipe. Leave for a couple of hours to clear. Cleaning Surfaces Dilute 50ml of Fenwicks Waste Pipe & Tank Cleaner to 450ml of water, apply using a trigger spray to all hard surfaces, allow 20 seconds to soak and wipe clear for a clean sanitised finish.
